Bucket for hoist-towers.



LMA. CLARK., BUCKET FOB. HOIST TOWERS.

APPLICATION FILED JAN, 13, 1913.

1,089,045, Patented Mar.3.1914.

UNITED STATES PATENT oFFIon.

LAWRENCE A. CLARK, or CHICAGO, ILLINOIS, AssIG'Non To AgaCHnn IBCN worms. or CHICAGO, ILLINOIS, A CORPORATION oF ILLINOIS.

BUCKET FOR HOIST-TOWERS.

Specification of Letters Patent.

Patented-Mar. 3, 1914..

Application filed January 13, 1913. Serial'No. 741,671.

To' all 'whom t may concern:

Be it known that I, LAWRENCE A, CLARK, a citizen of the United States, residing at l-Chicago, in the countyl of Cook and Sta-te of Illinois, have invented al certain -new and useful Improvement in Buckets for-Hoist- Towers, of which the following is a specification. i

My invention relates to improvements for buckets for hoist towers and the like, and` relates particularly to such buckets as are used-in connectionwith hoisting towers for handling concrete and the"l ike. hoist towers where the material is discharged into a bucket at the bottom ofthe tower and then drawn by a hoist to an open portion of the tower where it is then dumped considerable difficulties have been met in providing a dum-ping bucket. The bucket must be held in a vertical position for filling and for its transit to the top'of thel tower. It must then be tipped over so that the material can be discharged. The operation must be rapid, positive and .automatic in su-ch mannery that the hoisting engineer can have full control of the hoisting and dumping of the bucket.

Under ordinary circumstances. the hoist tower is provided with a pair of guides within which slide a so-called bail.` This bail carries a bucket which is .pivoted at its bottom. tothe bail or frame and provided with a latch at its top which latch is by suitable mechanism locked at all times except when the bucket is about to be dumped and which is at that time unlocked. This latch, of course, is a more or less complicated piece of machinery very likely to get out of order and likely to be ammed .by the concrete. In fact, experience shows thaty ordinarily when the workmen return to the work of the morning the concrete has to be cleaned out of the latch with a cold chisel and hammer' before it can be worked at all.

.My invention therefore has for its object to substitute for this unsatisfactory latch arrangement a device which will hold the bucket in the vertical position when this lis needed but which will freely permit it to be dumped without any difliculty of any kind whatsoever.

My invention is illustrated in thei accent bucket in a vertical or upright position; Fig.

In such 2, a view showing the bucket in the dumping position; and Fig. 3, a'section along line 3-3 of Fig. l with parts broken away.

Like parts are indicated by like letters throughout the several lgures l The hoist tower A .is provided with `the guides or rails A1 between which is slidably mounted the bail or frame A2. 'Ihe cable A3 leads upwardly from the bail overa sheave A4 and down tothe hoisting engine not shown. The lugs A on the bail or frame are located upon either side of the track .or guide and hold the bail or frame .at all times in parallelism with the' track.

'I he fins B project outwardly'on one side of the bail adjacent 'the ltwo these tins is mounted a` shaft 'B1 to which is pivoted the bucket B2. It will be noted that the shaft is to one side. of the bottom ofthe bucket so as to support the bucket eccentri callv the bucket resting when in the .upri ht position upon this bar and also upon he cradle or bracket B5 at one end of the bail. The bucket is open at the top and larger at the top than at the bottom. It is provided on one side with the rollers B3 which are lo- -cated on the same side of the bucket as the bar upon which it is pivotally mounted. These rollers are adapted to engage curved tracks or dumping Guides B4 rigidly mounted on the tower. Vhen the bucket is at the bottom of its path ready to be lled it assumes the upright position as indicated in Fig. l being held 1n the upright position .because it is eccentrically pivoted. When it is hoisted the roller comes in contact, with the dumping guides and pulls the bucket away from the bail in the usual manner until the'bucket assumes the position shown in Fig. 2 when it dumps into the hopper. As the bail is lowered the bucket will again be forced into theupright position and there held because of its eccentric support. ,By this arrangement no latch of any kind whatever is needed. There, is no tendency for the bucket to tip over and itis perfectly free at all times to be tipped for dumping when any force greater than the force of gravity is applied toit. This greater force is', of course, the lifting force of the cable pressing the bucket roller against the dumping guide,

It will be evident that, while I have shown in my drawing an operative device, still many changes might be made insize, shape l0 a cradle carried'by said frame a bucket resting 1n said cradle appivotalconnection between onev side nf'said bucket and said cradle and located below and to one side of the center of gravity of the bucket and means responsive tothe `upward .movement of the bucket for tilting it.

2. A hoist comprising a 'slidably mounted rectangular frame means for holding said rectangular frame in vertical position a cradle carried by said frame a bucket resting in said cradle a pivotal connection between one side of said bucket and said cradle and located beloW and to one side of the center of gravity of the bucket and means responsive 'to the upward movement of the bucket for tilting it said means comprisin a contact bucket on the same sideas the pivotal connection between the connection and cradle a fixed stop mechanism along the side of the path of the bucket in opposition to said contact member.

' In testimony whereof, I afxlmy signature in the presence of two Witnesses this 8th day of January 1913.

, LAVRENCE A. CLARK. Witnesses: v

MINNIE M. LINDENAU, l LILLIAN Gr. Ross.

25 member adjacent the upper e ge of 'the 

